Molecular Engineering of Intrinsic Chromophoric Polyimides: Chemically Amplified Color Photoresists for Advanced...

Area of Science:

• Materials Science
• Polymer Chemistry
• Optical Engineering

Background:

• Conventional dye-polymer photoresists lack thermal stability, durability, and long-term color fidelity.
• These limitations restrict their use in extreme environments like space exploration and advanced displays.

Purpose of the Study:

• To engineer intrinsically colored photosensitive polyimides (PSPIs) with enhanced material properties.
• To overcome the limitations of conventional photoresists for mission-adaptable applications.

Main Methods:

• Molecular engineering by incorporating anthraquinone chromophores into polyimide structures.
• Development of a four-component photoresist system including PSPIs, photoacid generators, alkaline additives, and cross-linkers.
• High-resolution lithography achieving 10 μm feature sizes.

Main Results:

• Precise spectral control across RGB tricolors achieved through chromophore integration.
• Synthesized PSPIs demonstrated high thermal stability (Tg > 270 °C, Td5% > 410 °C).
• Exceptional color stability under cryogenic, thermal cycling, and UV exposure conditions was confirmed.

Conclusions:

• The molecular design strategy provides a scalable platform for advanced colored photoresists.
• PSPIs offer a robust solution for applications requiring high performance and color stability in extreme environments.
• This advancement enables the development of mission-adaptable optical materials without compromising polyimide properties.